// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_BROWSER_WORKER_SERVICE_H_
#define CONTENT_PUBLIC_BROWSER_WORKER_SERVICE_H_

#include <vector>

#include "base/process/process.h"
#include "content/common/content_export.h"
#include "url/gurl.h"

namespace content {

class WorkerServiceObserver;

// A singleton for managing HTML5 shared web workers. These may be run in a
// separate process, since multiple renderer processes can be talking to a
// single shared worker. All the methods below can only be called on the IO
// thread.
class WorkerService {
public:
    virtual ~WorkerService() { }

    // Returns the WorkerService singleton.
    CONTENT_EXPORT static WorkerService* GetInstance();

    // Terminates the given worker. Returns true if the process was found.
    virtual bool TerminateWorker(int process_id, int route_id) = 0;

    struct WorkerInfo {
        GURL url;
        base::string16 name;
        int process_id;
        int route_id;
        base::ProcessHandle handle;
    };

    // Return information about all the currently running workers.
    virtual std::vector<WorkerInfo> GetWorkers() = 0;

    virtual void AddObserver(WorkerServiceObserver* observer) = 0;
    virtual void RemoveObserver(WorkerServiceObserver* observer) = 0;
};

} // namespace content

#endif // CONTENT_PUBLIC_BROWSER_WORKER_SERVICE_H_
